Nutcharut reached the final of the 2015
IBSF World Under-21 Snooker Championship for women, but lost 2–5 to
Baipat Siripaporn. Two months later, she won the 2018 World Women's Snooker Under-21 Championship without losing a frame, including a 3–0 victory over
Emma Parker in the final. In March 2019 she made a 147 break during a practice session, which was the first and only known
maximum break achieved by a female player. She defeated defending champion Ng in the quarter-final during her run to the
2019 World Women's Snooker Championship final, where she lost to 12-time champion Evans. Nutcharut was one of four women to be selected for the Women's Tour Championship held at the
Crucible Theatre, Sheffield in August 2019. She played Evans in the semi-finals, and after the pair had each won one frame, the match was settled on a rather than a third frame, due to time constraints. Evans won by potting the ball with a . The following month, Nutcharut won the 2019
International Billiards and Snooker Federation World Women's 6 Reds Championship, beating
Amee Kamani 4–2 in the final. At the Australian Open in 2019, Nutcharut and Ng were the only players to complete their qualifying groups without losing a frame. Nutcharut then registered wins over Kimberly Cullen 3–0, Carlie Tait 3–0 and
Jaique Ip 4–0 to reach the final against Ng. Nutcharut won the final 4–2, gaining her first ranking tournament win. From February 2020 to January 2022, Nutcharut did not compete on the World Women's Snooker circuit due to the
COVID-19 pandemic. At her first tournament back, she won the 2022 British Open with a 4–3 win against Evans. In March 2020, she retained the IBSF World Women's 6 Reds Championship by defeating
Diana Stateczny 5–3. She defeated Rebecca Kenna 5–1 in the semi-finals before facing
Wendy Jans in the final. Nutcharut's victory gave her a two-year professional tour card, allowing her to join Evans and Ng on the main World Snooker Tour the following season. Evans commented that she was not surprised that Nutcharut had won the tournament, commenting that "She's got a good game, a never say die attitude. She has a bright future ahead of her". In the wake of her victory, Nutcharut was invited to meet Prime Minister
Prayut Chan-o-cha, who told her that "You created a good story for Thais during this difficult time." Her next ranking title win was the 2022 Women's Masters, which saw her overcome Ng 4–0. Later in the season, she defeated the same opponent by the same score to claim the Belgian Open, for her first successful defence of a ranking title and her seventh ranking title overall. She lost 34 to Ng in the final of the Albanian Open, after having recovered from 03 to 33.
Bai Yulu defeated Nutcharut 65 in the final of the
2024 World Women's Snooker Championship, winning the deciding frame on the last . Nutcharut had not lost a frame in that year's tournament before the final. Nutcharut finished the season in top place in the rankings. She won the 2024 Australian Women's Open on the final black ball of the deciding frame against Ng. ==World Snooker Tour==